ML20054L600

RO 82-24 & 82-25:on 820606,during Entry Into Mode 3,unit Operated for Greater than 72-h W/Less than Required Number of Auxiliary Feedwater Trains W/Pump P-141 Inoperable.Cause Under Evaluation

ML20054L600
Person / Time
Site:	San Onofre
Issue date:	06/14/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-82-024, RO-82-025, RO-82-24, RO-82-25, NUDOCS 8207080286
Download: ML20054L600 (2)

Text

- - - - . . _ _ . . ~ . , . , _ - - . _-a = - - - ~_ w, . . - - - - -

w d

h 4,

i Southern California Edison Company 5 A N ONOFRE NUCLE A R GENEM A TING S T A TION

$5 P4. BOA 128 r

{ S A N C L EME N T E. C A LIFORNf A 92672 H. B. R AY TELEPHONE ST AT40N M AN AGE R 1 (714p 492 7 700

, c  : .,

June 14, 1982 il --

,[Jj I

'd

.5 0]

_e Ti U

U.S. Nuclear Regulatory Commission il

'9 l Office of Inspection and Enforcement i Region V }l i

1450 Maria Lane, Suite 210 Wal,ut Creek, Callfornia 94596-5368 i Attention: Mr. R. H. Engelken, Regional Administrator i

Dear Sir:

[

Subject:

Docket No. 50-361

) Written Confirmation of Prompt Reportable Occurrences Licensee Event Report Nos. 82-24 and 82-25 i

"an Onofro Nuclear Generating Station, Unit 2 i in accordance with Technical Specification 6.9.1.12.b, this submittal confirms the June 11, 1982 prompt Telephone notification to A.E. Chaffee, l NRC Resident inspector, of two reportable occurrences involving the l Auxiliary Feedwater System (AFWS) at San Onof re Unit 2.

t The reportable occurrences are associated with the Unit entry into l Mode 3 on June 6, 1982 and operation for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> with less l than the required number of Auxiliary Feedwater trains, based on the inoperability of bbtor Operated Valve 2HV 4713 in the discharge line of Auxiliary Feedwater Motor Driven Pump P-141. Further review of this matter has identified the possibility that the June 11, 1982 prompt notification was not necessary based on appropriate actions being taken with the trains as prescribed in the Technical Specifications following declaration of valve inoperability.

Our review of this matter is continuing. In the event that the invest-igation shows the valve, and consequently Pump P-141, inoperable during  !

! the time period in question, separate Licensee Event Reports will be submitted. LER 82-024, covering the Mode change while in an Action a

! Statement, would be due June 21, 1982. LER 82-025, discussing the failure to recognize that two Auxiliary Feedwater trains were simultan-eously inoperable, would be due June 23, 1982.

t 1

l t 82070802EE E20614 PER ADOCK O$000361 i s PDR

R.H. Engelken June 14, 1982 If there are any questions regarding the above, please contact me.

Sincerely, hb ) { lfl^$ tivi cc: A.E. Chaffee (UStlRC Resident inspector, San Onofre Unit 2)